If you’ve never considered owning a greenish, slightly radioactive device that glows in a circular pattern, then this Uranium Glass Marble Ring Oscillator, or UMRO might change your mind. It nominally runs on a 9V battery, and is small enough that it could be worn as a steampunk-style pendant or placed into an antique flashlight case as creator Aeon Junophor did with his. Or one of his at least, as he’s geared up to build multiples of this interesting unit.
In this episode of DIY or Buy I will be showing you how I created my own launchpad. That means I will show you how I combined a design idea with 3D Prints, WS2812 LEDs, tactile switches and an Arduino to create a proper MIDI instrument. While building I will also tell you a bit about a keyboard matrix and in the end determine what advantages the DIY Launchpad offers. Let’s get started!
What do you do when you don’t have enough controls on your MIDI keyboard? You build a MIDI controller of course! Using an Arduino and some basic components this is an easier feat than you may imagine!
At its most basic, an oscilloscope is an instrument that graphs an electronic signal over time. They’re extremely useful when evaluating electronics—particularly when you’re working with analog signals. Most modern oscilloscopes offer a lot of additional features that help you really dig into those signals, but simple oscilloscope functions can be handled by a small amount of hardware. Most of the cost in that case comes from the display itself, which is why you may want to follow this tutorial to turn a USB sound card into an oscilloscope that can be used with your computer.
If you’ve been looking for a robot chassis that can accommodate a wide range of computing and sensor hardware, then look no further than the TurtleBot. As explained here, while this TurtleBot3 can be purchased in both a “Burger” or “Waffle” configuration, it’s entirely possible for you to build this open source device yourself.
In this project I will show you why a class AB amplifier is pretty inefficient and how a class D amplifier on the other hand improves this efficiency. At the end I will show you how we can apply the theory of operation of a class D amp to a couple of common components in order to create our own DIY class D audio amp.
How to design and 3D print a 18650 Battery Charger for under $2 on an Ender 3 using a TP4056 module In this video I show you how I designed and 3D printed my 18650 battery charger and how I soldered all the wires.
The price of one charger for 4 batterys is under $2.
Price of a charger for 4 batterys: around $2 100 contacts $5
4 pair of contacts 4x $0.1 = $0.4
10 TP4056 $2
4 pieces 4 x $0.2 = $0.8
Some filament less then $1
In this video, we take a look at the Waveshare Gamepi43 do it yourself raspberry pi 3 b+ powered retro handheld console kit. This is easy to assemble NO SOLDER DIY handheld with a 4.3 inch IPS screen and iits capable of running RetroPie, Recalbox, Lakka or Batocera but it does have a few issues mainly the form factor of this thing so is it worth picking up? Let’s find out.
This video will show you how to make a small yet functional lab bench power supply, with the added feature of being able to power it from any DC power source anywhere between 3 and 50V.
The AdventurePi is a DIY portable retro gaming rig that uses RetroPie to emulate a variety of classic video game consoles. It’s comprised of a rugged, waterproof hard case that houses a portable display, Raspberry Pi computer, battery pack, controllers, and optional arcade controls.
